make a big thing (out) of

US /meɪk ə bɪɡ θɪŋ (aʊt) əv/
UK /meɪk ə bɪɡ θɪŋ (aʊt) əv/
"make a big thing (out) of" picture
1.

小題大作, 大驚小怪

to treat something as more important or serious than it really is

:
It was just a small mistake, don't make a big thing out of it.
那只是個小錯誤,別小題大作
She tends to make a big thing of every little problem.
她總是喜歡把小問題搞得很大